New Polymers with Controlled Architecture

具有受控的单分散树枝状大分子 将通过两种方法制备表面官能度。第一 涉及一种新的“趋同”方法， 大分子从它的外表面开始， 通过多官能的 单体与生长聚合物的单一反应性基团， 而第二种方法使用更经典的固相 approach. “融合增长”方法提供了无与伦比的 的数量和空间位置的控制， 在最终的球状体的外表面上的官能团 大分子 一旦准备好，树枝状分子将 用于制备具有不寻常的 架构和属性。 这将通过 工艺中表面官能团的改性 包括接枝、嵌段聚合或偶联反应。 特别地，线性聚合物链的生长形成 枝晶外表面的控制位置 将研究大分子。 这些新的合成 大分子组装将导致新材料， 性质导致其不寻常的拓扑结构，其统一 小尺寸（30-100）A），其对称或不对称 表面功能化，强分子的存在 dispoles，手性的存在等。这些的应用 预计新材料将出现在分子等各个领域 传输、催化和光电子学。

Monodispersed dendritic macromolecules having controlled surface functionality will be prepared by two methods. The first involves a novel "convergent" approach in which growth of the macromolecule starts at what will become its external surface and proceeds inwards through repeated coupling of a polyfunctional monomer to the single reactive group of the growing polymer, while the second method uses a more classical solid-phase approach. The "convergent growth" approach provides unparalleled control of both the number and the spatial location of the functional groups at the outer surface of the final spheroidal macromolecule. Once prepared, the dendritic molecules will be used to prepare new macromolecular assemblies with unusual architectures and properties. This will be done through modification of the surface functional groups in processes involving grafting, block polymerization, or coupling reactions. In particular, the growth of linear polymer chains form controlled locations on the outer surface of dendritic macromolecules will be studied. The synthesis of these new macromolecular assemblies will lead to new materials with novel properties resulting from their unusual topology, their uniform small size (30-100) A), their symmetrical or unsymmetrical surface functionalization, the existence of strong molecular dispoles, the presence of chirality, etc. Applications of these new materials are anticipated in areas as varied as molecular transport, catalysis, and optoelectronics.